There are two artists using this name. 1) Käyttöohje is the artist name for Aapo Hellman, a musician from Tampere, Finland. As Käyttöohje, Aapo plays the guitar, the drums, the recorders and the bass, and sings. Käyttöohje plays emotional and fragile folkish pop music. Aapo is also the manager of his own record company and booking acency Solmu Records & Booking. Solmu Records has released both EP's by Käyttöohje. "Sinusta sinulle" EP was released in 2005 and "Vihreä sydän" EP was released in 2007.